22211121220 has 48 divisors (see below), whose sum is σ = 49119739200. Its totient is φ = 8413165440.

The previous prime is 22211121193. The next prime is 22211121241. The reversal of 22211121220 is 2212111222.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22211121194 and 22211121203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 953310 + ... + 976330.

It is an arithmetic number, because the mean of its divisors is an integer number (1023327900).

Almost surely, 2^22211121220 is an apocalyptic number.

22211121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22211121220 is an abundant number, since it is smaller than the sum of its proper divisors (26908617980).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22211121220 is a wasteful number, since it uses less digits than its factorization.

22211121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25588 (or 25586 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22211121220 its reverse (2212111222), we get a palindrome (24423232442).

The spelling of 22211121220 in words is "twenty-two billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty".